中文摘要：

利用球磨法将具有纤维束结构的一维纳米凹凸棒石粉体进行亚微米颗粒化改造．将亚微米颗粒化凹凸棒石粉体分散在长城牌柴油机润滑油CD15W／40中，利用端面摩擦磨损试验和环-块摩擦磨损试验考察其减摩与自修复性能，并与未添加凹凸棒石粉体的CD15W／40进行对比．借助XRD、SEM、TEM、EDX和XPS对试验样品进行了分析测试，并探讨了亚微米颗粒化凹凸棒石粉体对45#钢磨损表面的自修复机理．结果表明：高能球磨可以完成将纤维状的凹凸棒石粉体向颗粒状转变的过程，改造后的粉体物相组成为凹凸棒石和石英，粒度属于亚微米级；CD15W／40添加亚微米颗粒化凹凸棒石粉体后，其减摩性提升58．4％；与CD15W／40润滑表面相比，加入亚微米颗粒化凹凸棒石粉体后，磨损表面光滑，没有明显犁沟、点蚀坑和表面材料塑性变形等现象；磨痕处存在与基体材料不同的修复区域，该修复区域沉积了O、Si、Fe等元素，说明亚微米颗粒化凹凸棒石粉体对45#钢具有优良的减摩性和自修复性能．

英文摘要：

One dimension nano attapulgite powders with a fiber fasciculus shape are ball milled into sub - micron granulated powders. The sub -micron granulated attapulgite powders are dispersed into engine oil, Great wall CD 15W/40. The friction reduction and self - repairing performance are researched using two kinds of configurations, plane - on - plane and ring- on- block, and a comparison is made between CD 15W/40 lubricant with and without sub -micron granulated attapulgite powders. X -ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X - ray spectroscopy and X - ray photoelectron spectrometer are employed to analyze the test samples. In addition, the self - repairing mechanism of sub - micron granulated attapulgite powders as an additive to lubricating oil to the worn surface is explored. The high - energy ball mill transform the fiber fasciculus attapulgite particles into granulated sub - micron particles which is composed of attapulgite and quartz. The friction coefficient of CD 15W/40 containing sub - micron granulated attapulgite is lower than that of base oil. Compared with the worn surface lubricated with CD 15W/40, the worn surface is smooth and free of obvious scratch, pitting, or plastic deformation. The repairing area characterized by deposition of elements O, Si, and Fe is different from the substrate material and this demonstrates that granulated attapulgite powders have excellent friction -reducing and self- repairing performances.